<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="../resources/test-helper.js"></script>
<head>
<title>Drag and drop to iframe: dropping block element onto canvas</title>
<style type="text/css">
div
  {width:20px;
  height:20px;
  background-color:green;}
iframe
  {width:200px;
  height:200px;
  border-style:none;}
</style>
<script type="application/ecmascript">
function start(event)
  {event.dataTransfer.effectAllowed = 'copy';
  event.dataTransfer.setData('text/plain', 'green');}
</script>
</head>
<body>
<div draggable="true" ondragstart="start(event)"></div>
<p>Drag green box above to the gray canvas below. Canvas should turn green when you drop green box on it.</p>
<p><iframe src="helper-drop-here-canvas.xhtml">Canvas</iframe></p>
<script>
async function test(){
  await new Promise(loaded => window.addEventListener("load", loaded));
  const iframe = document.querySelector('iframe');
  const innerDoc = iframe.contentDocument || iframe.contentWindow.document;
  const div = document.querySelector('div');
  const canvas = innerDoc.querySelector('canvas');
  function onDropCallBack(event) {
    let style = window.getComputedStyle(canvas);
    let currentColor = "rgba(0, 0, 0, 0)";
    assert_equals(style.getPropertyValue("background-color"), currentColor);
    return true;
  }

  dragDropTest(div, canvas, onDropCallBack, 'Dragging the div to the bottom iframe should turn it green', iframe);
}
test();
</script>
</body>
</html>
